Wing knob



FIG. 1 is a perspective view of a wing knob;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawing views are for the purpose of illustrating portions of the wing knob and form no part of the claimed design. The dash-dot-dash lines on the front of the wing knob indicate an unclaimed boundary between claimed and unclaimed parts of the design. 

CLAIM The ornamental design of a wing knob, as shown and described. 